From: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Date: Sun, 3 Aug 2014 09:24:05 +0000 (+0530)
Subject: powerpc/cpufreq: Add pr_warn() on OPAL firmware failures
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~134^2~33
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6174bac8c7ff73a86ae9a967d1c9cadc478023ae;p=pandora-kernel.git

powerpc/cpufreq: Add pr_warn() on OPAL firmware failures

Cpufreq depends on platform firmware to implement PStates.  In case of
platform firmware failure, cpufreq should not panic host kernel with
BUG_ON().  Less severe pr_warn() will suffice.

Add firmware_has_feature(FW_FEATURE_OPALv3) check to
skip probing for device-tree on non-powernv platforms.

Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Acked-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
CC: <stable@vger.kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

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